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https://github.com/esphome/esphome.git
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David Woodhouse
cfdb5a82e2
- Add get_build_time_string() function to format build time consistently - Replace __DATE__ ", " __TIME__ in App.pre_setup() with buildinfo call - Eliminates dependency on compiler-provided date/time macros - Ensures consistent build time across all build information displays
47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
// Build information using linker-provided symbols
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//
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// Including build information into the build is fun, because we *don't*
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// want the mere fact of changing the build time to *itself* cause a
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// rebuild if nothing else had changed. If we do the naïve thing of
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// just putting #defines in a header like version.h, we'll cause exactly
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// that.
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//
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// So instead we provide the config hash and build time in a linker
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// script, so they get pulled in only if the firmware is already being
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// rebuilt.
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#include "esphome/core/buildinfo.h"
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#include <cstdio>
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// Linker-provided symbols - declare as extern variables, not functions
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extern "C" {
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extern const char ESPHOME_CONFIG_HASH[];
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extern const char ESPHOME_BUILD_TIME[];
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}
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namespace esphome {
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namespace buildinfo {
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// Reference the linker symbols as uintptr_t from the *data* section to
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// avoid issues with pc-relative relocations on 64-bit platforms.
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static const uintptr_t config_hash = (uintptr_t) &ESPHOME_CONFIG_HASH;
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static const uintptr_t build_time = (uintptr_t) &ESPHOME_BUILD_TIME;
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const char *get_config_hash() {
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static char hash_str[9];
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snprintf(hash_str, sizeof(hash_str), "%08x", (uint32_t) config_hash);
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return hash_str;
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}
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time_t get_build_time() { return (time_t) build_time; }
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const char *get_build_time_string() {
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static char time_str[32];
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time_t bt = get_build_time();
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struct tm *tm_info = localtime(&bt);
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strftime(time_str, sizeof(time_str), "%b %d %Y, %H:%M:%S", tm_info);
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return time_str;
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}
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} // namespace buildinfo
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} // namespace esphome
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